JP2003274761A - Foliar spraying agent - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a foliar spraying agent which has coloring promotion of fruit and fruit vegetable as a main fertilizer response by taking consideration that the color of fruit or fruit vegetable is an extremely important factor to affect their commercial value and to promote coloring of the back of fruit, etc., without using a reflection sheet. <P>SOLUTION: An aqueous solution of the foliar spraying agent for fruit tree and/or fruit vegetable comprising potassium condensed phosphate, especially potassium tripolyphosphate as an active ingredient is sprayed on leaves. Apple, mandarin, persimmon, pear, etc., may be cited as the objective fruit. Tomato, strawberry, watermelon, melon, etc., may be cited as the fruit vegetable. Such effect is further promoted by adding and using a phosphoric acid ester surfactant. The effect is further surely obtained even in a large-scale orchard, etc. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a foliar spray agent, and more particularly to a foliar spray agent for improving the quality of fruit trees and vegetables, especially the coloration thereof.

[0002]

2. Description of the Related Art Foliar sprays are liquid chemicals containing nutrient components for various plants, and basically, by spreading and permeating the plant leaves, the nutrient components are absorbed from the leaf surfaces. It is a fast-acting drug. The drug is
It has been used favorably for a long time as a main fertilization method, which complements soil fertilization and is used as an emergency measure for improving the quality of agricultural products and physiological disorders.

Conventionally, fruit trees such as apples, pears and tangerines,
As an active ingredient of a foliar spray for the purpose of improving the sugar content of fruits and vegetables such as tomatoes and peppers, and improving quality such as disease resistance,
Various things are known. For example, calcium chloride,
Calcium nitrate, calcium formate, calcium carbonate, calcium acetate, calcium propionate, calcium ethylenediaminetetraacetate, calcium succinate, calcium lactate, magnesium silicate, calcium silicate, ascorbic acid, methionine, glycine, alanine, valine, serine, leucine , Aspartic acid, glutamic acid, monobasic calcium phosphate, monobasic potassium phosphate, magnesium phosphate and the like are known.

However, most of these components are mainly those which have a fertilizing effect such as improving the sugar content of fruit trees and vegetables, preventing and treating physiological disorders, and promoting hypertrophy, and which significantly improve coloring of fruits and the like. I can't find it.

Generally, fruit trees such as apples, mandarins, and oysters, and fruit vegetables such as tomatoes, strawberries, and melons are, first of all, high in sweetness components such as sugar content as criteria for judging their commercial value. There is a color on the surface (coloring)
Is one of the biggest factors to consider in stimulating consumers' willingness to buy.

When fruits such as apples, cherries, strawberries, and tomatoes are actually displayed as products, the bright and juicy red surface of the fruits attracts the eyes of consumers and draws their attention. It is the first step to do. It can be said that bright red apples, cherries, strawberries, etc., which are products lined up in fresh food counters such as supermarkets, are trying to appeal their existence in the counter with their bright red color. Shoppers who move around the store while looking for fresh and delicious fruits in their shopping basket are fascinated by this bright red color, and decide to purchase the apples based on this good impression. Reach

From the experience, the shopper recognizes and judges that the apple or the like is extremely sweet and has a lot of honey due to the bright red color. That is, such vivid coloring strongly appeals to the imaginary texture of the buyer.

As described above, apples, mandarins, and the like are sold in vivid colors, while undesirably colored apples and the like are eventually unsold and left for disposal. Therefore, for growers and sellers of fruits and vegetables, the color of the appearance of the fruits and the like has a very important meaning that influences the sales of the products, and cannot be loosened. In addition, for apples and the like as products, it is important that the appearance is vividly colored in terms of the commercial value of the product, and is extremely desirable.

[0009] Conventionally, as a foliar spray agent which has been disclosed for the purpose of improving the sugar content of fruits, increasing the yield, improving the number of fruits, and the like, the effect of improving the coloring of such important fruits, monobasic magnesium phosphate powder and a water-soluble agent are used. Boron Compound Powder 1: 1
Only an aqueous solution of a mixture of about 1:10 is known (see Patent Document 1). However, this spraying agent requires the combined use of a boron compound together with magnesium phosphate, and when the boron compound is in excess, there is a fear that excess damage thereof may occur, so that it is difficult to prepare the optimum proportion thereof. There's a problem. Further, magnesium phosphate is generally hardly soluble, and there is a problem that it is difficult to handle as an aqueous solution.

On the other hand, in general, there is a problem in that coloring is delayed by necessity because sunlight is hard to be irradiated on the back side (buttocks) of the front side (vines) of fruits such as apples. For this reason, many farmers lay a reflective sheet on the ground so that the back side is also illuminated with reflected light. Such a reflection sheet has a width of 140 cm (or 1
80 cm) and a length of about 50 m, but in order to perform irradiation by reflection, it is most preferable to spread it over the entire garden and reflect the entire ground like a mirror. There is.

Ironically, however, the stronger the reflected light is, the more intensely the field worker who works there receives the strong reflected light from the reflection sheet, which is extremely dazzling and damages the eyes. There is a fear of
Further, the reflection sheet is expensive, and it costs a considerable amount to purchase the reflection sheet, and there are also troublesome problems such as fixing work on the ground and environmental restrictions when discarding an old sheet.

[0012]

[Patent Document 1] JP-A-6-107488

[0013]

DISCLOSURE OF THE INVENTION The object of the present invention is, as described above, in view of the fact that the color of fruits and vegetables is a very important factor that affects the commercial value thereof, and in particular, the promotion of its coloring is the main fertilizing effect. To provide a foliar spraying agent. Another object of the present invention is to provide a foliar spray agent that promotes coloring on the back side (fruit apex) of fruit trees as well as on the front side without using the above-mentioned reflection sheet or the like.

[0014]

According to the present invention, the following inventions described in the claims are provided.

The foliar spray of claim 1 is a foliar spray for fruit trees and / or fruit vegetables, which comprises a potassium salt of condensed phosphoric acid as an active ingredient.

The foliar spray of claim 2 is such that the potassium salt of condensed phosphoric acid is potassium tripolyphosphate.

The foliar spray agent according to a third aspect of the present invention is a foliar spray agent obtained by further adding a phosphate ester type surfactant to the above foliar spray agent.

The method for promoting coloration according to claim 4 is characterized in that an aqueous solution of a foliar spray agent containing a potassium salt of condensed phosphoric acid as an active ingredient is sprayed on the leaves, and the coloration of fruits and / or vegetables is promoted. Is the way.

The method for promoting coloration according to claim 5 is a method for promoting coloration of fruits and / or vegetables wherein the potassium salt of condensed phosphoric acid is potassium tripolyphosphate.

In the method for promoting coloration according to claim 6, a foliar spray agent is further mixed with a phosphate ester type surfactant, and an aqueous foliar spray agent solution is sprayed on the leaf surface. This is a color promotion method.

[0021]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in detail below.

The foliar spray of the present invention is basically a foliar spray for fruit trees and vegetables containing a potassium salt of condensed phosphoric acid as an active ingredient.

Here, potassium salt of condensed phosphate means
Lusolinic acid (H₃PO_Four) (Orthophosphoric acid) is condensed by 2 mol or more
Salt of condensed phosphoric acid (also called polyphosphoric acid)
Is. The condensed phosphoric acid is not particularly limited
But not pyrophosphate (H _FourP₂O₇), Tripolyline
Acid (H_FiveP₃O_Ten), Trimetaphosphoric acid (H₃P₃O₉), U
Lutraphosphoric acid (H₂P_FourO₁₁), Tetrametaphosphoric acid (H_Four
P_FourO₁₂), Isotetrapolyphosphoric acid (H₆P_FourO₁₃), Te
Trapolyphosphate (H₆P_FourO₁₃), Hexametaphosphoric acid (H
₆P₆O₁₈), And further highly condensed phosphoric acid (H_{n + 2}P_nO
_{3n + 1}) (N> 4) and the like.

The potassium salt of the condensed phosphoric acid may be an acidic salt thereof, but a salt in which all the acidic groups are neutralized with potassium is most preferable.

For example, potassium pyrophosphate (K ₄ P ₂ O ₇ ),
Potassium tripolyphosphate (K ₅ P ₃ O ₁₀ ), Potassium trimetaphosphate (K ₃ P ₃ O ₉ ), Potassium ultraphosphate (K ₂ P
₄ O ₁₁ ), potassium tetrametaphosphate (K ₄ P ₄ O ₁₂ ), potassium isotetrapolyphosphate (K ₆ P ₄ O ₁₃ ), potassium tetrapolyphosphate (K ₆ P ₄ O ₁₃ ), potassium hexametaphosphate (K ₆ P ₆
O ₁₈ ), and further highly condensed potassium phosphate (K _{n + 2} P _n O
_{3n + 1} ) (n> 4) and the like are preferred.
And potassium tripolyphosphate is the most preferable from the viewpoint of easy availability and handling. Also, potassium tripolyphosphate is
Basically, it is a highly safe compound that is approved as a food additive for the human body and can be used safely.

One of these condensed potassium phosphates may be used alone, or two or more thereof may be mixed and used. Further, a small amount of potassium orthophosphate may be mixed with the condensed potassium phosphate. The mixed amount is 50 mass% or less, preferably 30 mass% or less, and more preferably 10 mass% or less.

The foliar spray of the present invention contains the above-mentioned condensed potassium phosphate as an active ingredient, and is preferably handled as a solid (powder) or a concentrated slurry of condensed potassium phosphate during transportation and storage. However, when sprayed, it is usually used in the form of a diluted aqueous solution containing the condensed potassium phosphate.

The concentration of the potassium phosphate complex in the aqueous foliar spraying agent solution at the time of spraying is appropriately selected depending on the type of the potassium phosphate salt, the type of target fruit tree or fruit, the number of times of spraying, the site of spraying, the season of spraying, etc. However, it is usually 0.01 to 1% by mass, preferably 0.02 to 0.5% by mass, and more preferably 0.05 to 0.1% by mass. Here, for example, in order to prepare a spraying agent of 0.1% by mass, 1 part by mass (powder) of condensed potassium phosphate may be added (1000 times diluted) with 1000 parts by mass of water and dissolved. Also 0.05
In order to prepare a mass% spray agent, 2000 parts by mass of water may be similarly added (diluted 2000 times) and dissolved.

In the foliar spray agent of the present invention, it is not excluded that a suitable amount of various components usually used in foliar spray agents are contained together with condensed potassium phosphate which is an essential active ingredient.

For example, inorganic components such as calcium, magnesium, manganese, molybdenum, silicon, boron, iron, zinc, copper, silicic acid, boric acid and sodium; organic acids such as citric acid, acetic acid, gluconic acid and lactic acid; glycine , Amino acids such as glutamic acid, aspartic acid, proline, hydroxyproline, alanine, phenylalanine, lysine, arginine, valine, leucine, isoleucine, serine, methionine, threonine, histidine; vitamins such as vitamin C; sugars such as sucrose and sugar Each component can be contained.

Further, other fertilizer components, for example, nitrogenous fertilizers such as urea, ammonium sulfate, ammonium chloride, ammonium nitrate, sodium nitrate, and guanylurea sulfate; phosphates such as ammonium phosphate, lime superphosphate, and calcined phosphorus fertilizer. Fertilizer: It is also possible to contain an appropriate amount of components corresponding to so-called three elements such as potassium fertilizer such as potassium chloride, potassium sulfate, potassium bicarbonate, etc., if desired.

Further, so-called spreading agents and surfactants may be added in order to enhance the wettability of the foliar spray to the surface of the plant body and improve the foliar absorption.

As the surfactant, nonionic surfactants such as sorbitan fatty acid ester, sucrose fatty acid ester, polyoxyethylene alkyl ether, polyoxyethylene alkyl allyl ether, polyoxyalkylene alkyl sorbitol ester, sodium allyl sulfate,
Examples thereof include anionic surfactants such as sodium alkylnaphthalene sulfonate, alkyl sulfosuccinate, alkyl sulfate, sodium α-olefin sulfonate, and sodium alkane sulfonate.

As the surfactant to be blended, the above-mentioned ones are usually used. Among them, the acidic type obtained by esterifying an ether type nonionic surfactant with phosphoric acid is particularly preferable for the purpose of the present invention. Can be mentioned.

Examples of the phosphoric acid ester include phosphoric acid esters such as polyoxyalkylene alkyl ether, polyoxyalkylene alkylphenyl ether and polyoxyalkylene allyl ether, and are represented by the following formulas (1) and (2): It is a phosphoric acid ester of polyoxyethylene alkyl ether, polyoxyethylene alkylphenyl ether, or polyoxyethylene allyl ether.

[0036]

[Chemical 1]

(In the formulas (1) and (2), R is an alkyl group having about 8 to 30 carbon atoms, an alkylphenol group, an alkylphenyl group, an alkenyl group, n is an average addition mole number of ethylene oxide of 0 to 50, It is preferably about 4 to 50.)

As the phosphoric acid ester, the monoester of the formula (1) and the diester of the formula (2) may be used alone, but a mixture thereof may be used, and a small amount of the triester is further mixed. May be. These phosphoric acid esters may be synthesized by a conventional method, but they are commercially available to the general public and can be preferably used (for example, "phosphanol" manufactured by Toho Chemical Industry Co., Ltd.).
(Trademark) RS-410, RS-610, RS-710,
"Prysurf" (trademark) A208 manufactured by Dai-ichi Kogyo Seiyaku
B, A219B, A208S, etc. ). In addition, these may be neutralized with an alkali to a suitable pH.

Compounding amount of the phosphoric acid ester (combined amount)
Is 30% by mass or less, preferably 20% by mass or less, more preferably 10% by mass or less and 1% by mass or more with respect to the potassium salt of condensed phosphoric acid as a main active ingredient.

In the foliar spray agent of the present invention, particularly by incorporating the above-mentioned phosphate ester, absorption from the leaf surface or stem surface of the foliar spray agent is promoted,
Even when spraying a large number of fruit trees in a vast orchard, its absorption efficiency is high, and the spraying effect is averaged for each fruit tree, and the effect of the foliar spray is more reliably achieved in the orchard as a whole. It

Further, bentonite, attapulgite, guar gum, xanthan gum, methyl cellulose, carboxymethyl cellulose, polyvinyl alcohol,
Thickeners such as sodium alginate and starch, pH adjusters,
If necessary, pesticides such as bactericides and insecticides, antifreezing agents, coloring agents, chelating agents, defoaming agents, and antistatic agents can be contained.

As the fruit tree to which the foliar spray of the present invention is applied, its coloring is particularly important in terms of commercial value, such as apple, mandarin orange, oyster, pear, cherry,
Examples thereof include grapes, loquats, apricots, peaches and plums, and examples of fruit vegetables include tomatoes, strawberries, watermelons and melons, but are not limited thereto. Furthermore, it is also possible to use it for peppers, eggplants and cucumbers.

The foliar spray aqueous solution containing the potassium salt of condensed phosphoric acid of the present invention as an active ingredient is mainly applied to the leaf surface (front surface and / or back surface) of the target fruit tree or fruit vegetable by a spraying means such as a sprayer. ). The spraying time and the number of sprays are not particularly limited, but usually 1 to 5 at the time of ripening of the fruit, with an interval before the harvest.
Times, preferably about 1 to 3 times. Depending on the case, even if spraying once or twice, the effect can be sufficiently exerted.

The application amount per time may vary depending on the type of fruit tree or fruit vegetable, but as a rough guide, it is 0.
The amount is 1 to 100 g, preferably 0.5 to 50 g, and more preferably 1 to 10 g. Usually, the spraying is preferably carried out in the morning or in the evening, and as mentioned above, it is possible to use it in combination with an agricultural chemical.

[0045]

EXAMPLES The present invention will be described below with reference to examples. In the examples, "%" means "mass%" unless otherwise specified.

In the subsequent tests, the sugar content was measured by a sugar refractometer and expressed as a Brix value. The hardness was measured by a hardness meter, and the result was expressed in pounds. Also,
No reflective sheet was used in any of the tests.

Example 1 In Nagano prefecture, apple trees (variety: Tsugaru) were subjected to a spray test of a foliar spray containing potassium tripolyphosphate as an active ingredient. As the concentration of the spraying agent, 0.1 g of potassium tripolyphosphate diluted in 1 L of water (hereinafter referred to as 1000-fold diluted product) and 0.05% of 1 g diluted in 2 L of water. Concentration (hereinafter referred to as 2000-fold diluted product) was sprayed at 5 L per strain. The test plots were A, B and C (non-scattering plots). The test conditions are as shown in Table 1, and sprayed once or twice before the harvest day.

[0048]

[Table 1]

In the table, A-1 and B-1 are 1000-fold diluted products sprayed only once, and A-2 and B-2 are 200.
The 0-fold diluted product was sprayed twice.

Table 2 shows the results of measuring sugar content and hardness of each of the five representative apple samples obtained in the above test section. In the test plots A and B of the present invention, in particular, the sugar content is significantly higher than that of the sample in the non-scattering plot C. In addition, these samples are arranged and compared visually.
While observing, we took a picture with a digital camera and compared them. FIG. 1 is an example of a photograph showing the coloring state of the surface of the apple sample in the test section and the non-scattering section. From the visual observation and the photographs recording these results, it is clear that all of the sprayed areas (A, B) are on both the front and back sides.
The apples were colored bright red overall. On the other hand, the apples in the non-scattering area are still mostly blue not only on the back side but also on the front side, and only a part is colored reddish, and there is a remarkable difference between the two. Admitted.

[0051]

[Table 2]

(Example 2) In Nagano prefecture, apple trees (cultivar: Fuji) were subjected to the same foliar spray test using potassium tripolyphosphate as an active ingredient in the same test as in Example 1. As the concentration of the spraying agent, a 1000-fold diluted product was used.

As a test group, 3 strains (a, b, c) were set as a spraying group, and 3 strains (a ', b', c ') were set as a non-scattering group.

For the spraying area, the date of harvest (November 15)
One month before (Sunday) (October 11th), 5 L was sprayed per share.

10 pieces were randomly harvested from 3 strains in each test section, and sugar content and hardness of 5 pieces were measured. The results are shown in Table 3.

[0056]

[Table 3]

The apple samples of the test plots (a, b, c) of the present invention have a significantly higher sugar content in comparison with those of the non-dispersed plots (a ', b', c '). Was confirmed. In addition, these samples were lined up and photographed with a digital camera for comparison. Clearly from the photograph recording the results, all of the sprayed areas are apples colored in bright red on the front side and the back side, whereas the apple samples in the non-sprayed area are on the front side. Even in the case, a considerable part remained blue and there were few areas colored red, and a remarkable difference was observed between the two. In addition, the apple samples were cut and the degree of honey content inside was examined. Compared to the non-dispersed area, the honey content was sparse, but the scattered area was much richer. It was obvious that they were doing it.

(Example 3) In Shizuoka Prefecture, a citrus tree (variety: early-ripening Unshu) was subjected to the same foliar spray test using potassium tripolyphosphate as an active ingredient in the same manner as in Example 1. As the concentration of the spraying agent, a 1000-fold diluted product was used.

As a test group, 3 strains (a, b, c) and another 3 strains (a ', b', c ') were sprayed on the 3 strains (a'',b'',c').') Is a non-scattering area and is set as shown in Table 4.

[0060]

[Table 4]

Five samples were collected from each of the three test plots, and the mass, sugar content, acidity and color (red color value) were measured on the day.
The results are shown in Table 5.

[0062]

[Table 5]

As is clear from Table 5, the mandarin orange samples of the potassium tripolyphosphate application section of the present invention were
Significant differences were found in sugar content and acidity compared to the non-scattered sample, and a large difference in color (red color value) was also observed.
The red color value is a value indicating the degree of coloring, and the higher the value, the better the coloring. Also,
These samples were lined up and photographed with a digital camera for comparison. Clearly from the photograph recording the result, all the sprayed areas are oranges that are all colored in bright yellow, compared to the oranges in the non-dispersed area,
There was a clear difference between the two.

Example 4 A spray test of a foliar spray containing potassium tripolyphosphate as an active ingredient as a foliar spray, and a phosphoric acid ester added to the active ingredient was conducted in Nagano prefecture with an expanded test scale. . The target fruit tree is an apple tree (variety: Tsugaru).

The phosphoric acid ester is represented by the formula (1),
A mixture consisting of a monoester and a diester represented by (2) ("Fosphanol" (trademark) RS-610, manufactured by Toho Chemical Industry Co., Ltd., HLB: 10.5, p.
H2.5 or less) was adopted.

As the spraying agent, potassium tripolyphosphate 1.
0 g and 0.05 g of the above phosphoric acid ester were diluted with 1 L of water and used at a concentration of 0.1% (5% phosphoric acid ester mixed with potassium tripolyphosphate, 1000-fold diluted product; the same applies hereinafter).

The test scale was 1.5a (5 strains), and the 1000-fold diluted product was sprayed at 10 L per strain. As shown in Table 6, the spraying schedules were A ward (1 time spraying), B ward (2 times spraying), C ward (3 times spraying) and D ward (no spraying). The harvest date was August 21st.

[0068]

[Table 6]

Table 7 shows the average values of the results obtained by measuring the coloration, sugar content, maturity, hardness, etc. of 30 harvested products in each test section. The coloring was measured by a color sensor (the same applies below unless otherwise specified).

[0070]

[Table 7]

As is clear from Table 7, particularly in the case of the 3-spraying group (C), a remarkable effect on coloring was recognized. Also,
The proportion of royal (redness of 138 or higher, the same applies hereinafter), which is the highest quality, was remarkably remarkable, especially in the 3-spray area.

In the orchard where an actual test was conducted, the apple coloring in the sprayed plot was compared with that in the non-scattered plot before the actual measurement of the coloring degree of individual fruits after harvesting. The difference was obvious at first sight. That is, in the state of a standing tree in which countless apple fruits are reddish in the green leaves of many trees against the blue sky, there is a remarkable difference in vividness, which is truly spectacular. It was Of course, this result is recorded and confirmed by color digital photographs.

(Example 5) A spray test of a foliar spray containing 5% of a phosphoric acid ester similar to that in Example 4 was carried out in a test group of 10a in Nagano prefecture (1000-fold diluted solution, per share). 10L spray). The target fruit tree is the same apple tree as in Example 5 (variety: Tsugaru).

The application schedule was the same as in Table 6.
The test results are shown in Table 8.

The number of samples of the harvested product is the test area A.
462 (one-time spray) and 51 in test area B (two-time spray)
One is the average value of 537 samples in the test section C (3 times spraying) and 152 samples in the test section D (non-scattering).

[0076]

[Table 8]

As is clear from Table 8, the improvement in coloring was great in the sprayed group, and was particularly remarkable in the C group (3 times sprayed). Further, the proportion of “royal”, which is the highest quality, is higher than that in the non-dispersed area (D area), and it is particularly noted that in C area, 90% or more is the royal.

In addition, the apples in the sprayed area were colored in a state of a standing tree that had red fluff in the green leaves of the tree before harvesting, as compared with the fruit trees in the non-dispersed area.
It was obvious at a glance that there was a marked difference in the vividness. The results were recorded and confirmed by color digital photographs.

(Example 6) A spray test of a foliar spray containing 5% of a phosphoric acid ester similar to that in Example 4 was conducted in a test group 10a in Nagano prefecture.

The target fruit tree is an apple tree (cultivar: Fuji), the test scale is 10a, and the spraying agent is 1000.
The double dilution was sprayed at 10 L per strain.

The spraying schedule is based on Table 6, and is in ward A (1 spraying / October 10th), B ward (2 times spraying / September 30th, October 10th), C ward (3 Dispersion / September 20, September 30, October 10). The harvest date of all the test plots was October 31st. In each test area,
The average results for 20 harvested samples are shown in Table 9.

[0082]

[Table 9]

As is clear from Table 9, apple (Fuji)
As for the results of the spraying of No. 1, the sugar content was significantly improved as well as the coloring. Further, the effect of spraying was also observed on the fruit diameter (the larger the better).

Example 7 A spray test of a foliar spray containing 5% of a phosphoric acid ester similar to that in Example 4 was carried out for the target fruit tree peach (cultivar: Akatsuki) also in Nagano prefecture.

The test scale is 1.5a (3 strains / district),
A 1000-fold diluted solution was sprayed on 50 L / 3 strains. In addition, the spraying schedule is based on Table 6, and is in A ward (spraying once /
July 5th), ward B (spray twice / June 24th, July 5th)
Sun) and C ward (3 times spraying / June 14, June 24, July 5). The harvest date of all the test plots was July 25.

Nine harvested samples were collected and tested in each of the A, B, C and D plots. The results are shown in Table 10.

[0087]

[Table 10]

From Table 10, in the case of peach, especially coloring is
It is recognized that any of the sprayed areas (A, B, C) is larger than the non-dispersed area (D).

(Example 8) A spray test of a foliar spray containing 5% of the same phosphoric acid ester as in Example 4 was similarly carried out in Nagano prefecture using grapes (cultivar: Merlot) as the target fruit tree.

The test scale is 10a (3 strains / each ward),
A 1000-fold diluted solution was sprayed on 500 L / 10a.

The application schedules are as shown in Table 6 for A ward (1 application / 9th September), B ward (2 applications / 30th August).
Sunday, September 10) and C ward (3 times spraying / August 20, August 30, September 10). The harvest date of all the test plots was October 3.

Twenty-five tufts were collected from each plot, and three per tuft (upper, middle, and lower) were sampled, and 75 grains per plot were ground, extracted, and subjected to analysis. The results are shown in Table 11.

[0093]

[Table 11]

From Table 11, it was confirmed that the sugar content in the sprayed group was improved by about 1 to 2% as compared with the non-scattered group. This grape is basically a grape for wine, and it is said that the higher the sugar content, the more preferable.
The difference in% is an extremely significant difference in terms of quality for growers.

Example 9 A foliar spraying agent containing 5% of a phosphoric acid ester similar to that in Example 4 was subjected to a spraying test on the target fruit-tree rich oyster (cultivar: Matsumoto Hayao) under Fukuoka prefecture.

The 1000-fold diluted solution was sprayed twice in early September and late October, and harvested at the end of October. The results are shown in Table 12. The coloring of the oyster was measured with a coloring color gauge.

[0097]

[Table 12]

From Table 12, it can be seen that a large spraying effect is recognized in terms of coloring and sugar content.

[0099]

INDUSTRIAL APPLICABILITY According to the present invention, the use of a foliar spray containing a potassium salt of condensed phosphoric acid as an active ingredient for fruit trees and vegetables is an extremely important factor that affects the commercial value thereof. The color (coloring) of fruits and vegetables is significantly improved.

Coloring is also promoted on the front and back sides of fruit trees and the like without using a reflection sheet. Therefore, it is said that the producers will be able to increase the sugar content etc. faster than before and ship the brightly colored apples, mandarins, etc., and therefore the industrial applicability is extremely high. I have no choice.

Note that such an effect is further promoted by blending / combining a phosphoric acid ester type surfactant, and the effect is more reliably exhibited even in a large-scale orchard.

[Brief description of drawings]

FIG. 1 is a morphological photograph of an organism showing the surface condition of apples when the foliar spray agent of the present invention is sprayed.

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Satoshi Iwamoto             3-11-11 Nihonbashi Odenmacho, Chuo-ku, Tokyo             Jito Pressure Fertilizer Co., Ltd. F-term (reference) 2B022 EA03                 4H061 AA01 BB30 EE70 HH35 JJ02                       KK03

Claims (6)

[Claims] 1. A foliar spray for fruit trees and / or fruit vegetables, which comprises a potassium salt of condensed phosphoric acid as an active ingredient. 2. The foliar spray according to claim 1, wherein the potassium salt of condensed phosphoric acid is potassium tripolyphosphate. 3. The foliar spray agent according to claim 1, which further comprises a phosphate ester type surfactant. 4. A method for promoting coloration of fruits and / or fruit vegetables, which comprises spraying an aqueous foliar spray solution containing a potassium salt of condensed phosphoric acid as an active ingredient on the leaves. 5. The method for promoting coloration of fruits and / or vegetables according to claim 3, wherein the potassium salt of condensed phosphoric acid is potassium tripolyphosphate. 6. A method for promoting coloration of fruits and / or fruit vegetables, which comprises spraying an aqueous solution of a foliar spray agent on the leaves, further comprising a phosphate ester type surfactant.